La Carta de Derechos (The Bill of Rights)

What causes sound? How does sound travel? Sound begins when matter vibrates. Without this vibration sound could not move and nothing would make any noise. Starting with tiny molecules, this book explains the main concepts of sound and furthers understanding through a series of easy-to-do experiments that will appeal to readers of all ages.

People today refer to the Midwestern and prairie states as flyover country. During the Civil War, crossing those areas was the biggest obstacle in uniting the East and West Coasts of our divided nation. An act of Congress in 1862 authorized the Central Pacific and the Union Pacific railroad companies to build a railroad that would link the coasts. Seven years later, on May 10, 1869, an overwhelmingly immigrant labor force completed the task when a rail line was join in Promontory, Utah. The states had become united at last.

Every day, living things grow and change. How do they do it? Find out by exploring the life cycles of various animals. This nonfiction Spanish book teaches students important scientific concepts and terminology. The diagrams, sidebars, text features, and colorful images will keep students connected to the text. Aligned to state and national standards, the fun lab activity provides a real-world learning experience that supports STEM instruction. Keep students reading with this fascinating Spanish book!

Las asignaturas relativas al estudio aplicado de los impuestos en España se han consolidado en los planes de los grados impartidos en la Facultad de Economía y Empresa de la Universidad de Zaragoza. Tales asignaturas tienen la denominación de Fiscalidad de la Empresa (del primer semestre del segundo curso de los Grados en Administración y Dirección de Empresa, Finanzas y Contabilidad y Marketing e Investigación de Mercados) y de Sistema Fiscal Español I (en el segundo semestre del tercer curso del Grado en Economía), y son obligatorias. Para impartirlas ha de emplearse una fuente...